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Enhancing DPCD in Liquid Products by Mechanical Inactivation Effects: Assessment of Feasibility

  • The enhancement of standard dense phase carbon dioxide (DPCD) pasteurization by additional mechanical effects was assessed in this work. These effects were induced during pasteurization by the sudden depressurization in a narrow minitube. The high flow velocities, moderate pressures (40–80 bar) and low temperatures (25–45 °C) lead to intense degasification and shear stress. The inactivation of the test microorganism Escherichia coli DH5α (E. coli DH5α) was determined before and after depressurization in the minitube, representing entirely chemical DPCD via dissolved CO2 and total inactivation comprising the effects of dissolved CO2 and mechanical effects, respectively. Compared to conventional DPCD pasteurization, which is mostly attributed to chemical effects, the additional mechanical effects increased the inactivation efficiency considerably.

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Metadaten
Author:Ratka Hoferick, Frank Gockel, Mareike Müller, Holger Schönherr, Stéphan Barbe
URN:urn:nbn:de:hbz:832-epub4-16179
DOI:https://doi.org/10.1002/cite.202000011
Parent Title (German):Chemie Ingenieur Technik
Year of Completion:2020
Publisher:Wiley-VCH Verlag
Document Type:Article
Language:English
Date of first Publication:2020/07/22
Date of Publication (online):2021/02/23
Tag:Dense phase carbon dioxide; Mechanical effects; Non‐thermal microbial inactivation; Pasteurization; Shear stress
Volume:92
Issue:8
Page Number:4
Institutes:Angewandte Naturwissenschaften (F11)
Dewey Decimal Classification:500 Naturwissenschaften und Mathematik
Open Access:Open Access
DeepGreen:DeepGreen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International